/*
 * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.svm.hosted;

// Checkstyle: allow reflection

import java.lang.reflect.Method;

import org.graalvm.compiler.serviceprovider.JavaVersionUtil;

import com.oracle.svm.core.util.VMError;
import com.oracle.svm.util.ReflectionUtil;

public class BootLoaderSupport {

    /**
     * Gets the boot loader or {@code null} if it does not exist.
     */
    public static ClassLoader getBootLoader() {
        if (JavaVersionUtil.JAVA_SPEC <= 8) {
            // In JDK 8 there is not boot class loader class
            return null;
        }
        Class<?> classLoadersClass;
        try {
            // Checkstyle: stop
            classLoadersClass = Class.forName("jdk.internal.loader.ClassLoaders");
            // Checkstyle: resume
            Method method = ReflectionUtil.lookupMethod(classLoadersClass, "bootLoader");
            Object r = method.invoke(null);
            return (ClassLoader) r;
        } catch (ReflectiveOperationException e) {
            throw VMError.shouldNotReachHere("Cannot get access to the boot loader", e);
        }
    }
}
